#define _CRT_SECURE_NO_WARNINGS 1
#include"Stack.h"
void StackInit(ST* ps)
{
	assert(ps);
	ps->a = (STDataType*)malloc(sizeof(STDataType) * 4);
	if (ps->a == NULL)
	{
		perror("malloc fail!");
		exit(1);
	}
	ps->capacity = 4;
	ps->top = 0;
}
void StackDestroy(ST* ps)
{
	assert(ps);
	free(ps->a);
	ps->a == NULL;
	ps->top = ps->capacity = 0;
}
void StackPush(ST* ps, STDataType x)
{
	assert(ps);
	if (ps->capacity = ps->top)
	{
		STDataType* tmp = realloc(ps->a, ps->capacity * sizeof(STDataType) * 2);
		if (tmp == NULL)
		{
			perror("malloc fail!");
			exit(1);
		}
		else
		{
			ps->a = tmp;
			ps->capacity *= 2;
		}
	}
	ps->a[ps->top] = x;
	ps->top++;
}
void StackPop(ST* ps)
{
	assert(ps);
	assert(ps->top > 0);
	ps->top--;
}
STDataType StackTop(ST* ps)
{
	assert(ps);
	assert(ps->top > 0);
	return ps->a[ps->top - 1];
}
int StackSize(ST* ps)
{
	assert(ps);
	return ps->top;
}
bool StackEmpty(ST* ps)
{
	assert(ps);
	return ps->top == 0;
}